Base | Representation |
---|---|
bin | 11111001010011… |
… | …11100111110100 |
3 | 200012220120221212 |
4 | 33211033213310 |
5 | 1013410442211 |
6 | 41535100552 |
7 | 6323021654 |
oct | 1745174764 |
9 | 605816855 |
10 | 261421556 |
11 | 124624980 |
12 | 73671758 |
13 | 42211316 |
14 | 26a10364 |
15 | 17e3d38b |
hex | f94f9f4 |
261421556 has 12 divisors (see below), whose sum is σ = 499077600. Its totient is φ = 118827960.
The previous prime is 261421487. The next prime is 261421571. The reversal of 261421556 is 655124162.
It is a super-2 number, since 2×2614215562 = 136682459882922272, which contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970656 + ... + 2970743.
It is an arithmetic number, because the mean of its divisors is an integer number (41589800).
Almost surely, 2261421556 is an apocalyptic number.
It is an amenable number.
261421556 is a deficient number, since it is larger than the sum of its proper divisors (237656044).
261421556 is a wasteful number, since it uses less digits than its factorization.
261421556 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5941414 (or 5941412 counting only the distinct ones).
The product of its digits is 14400, while the sum is 32.
The square root of 261421556 is about 16168.5359881469. The cubic root of 261421556 is about 639.4115326494.
The spelling of 261421556 in words is "two hundred sixty-one million, four hundred twenty-one thousand, five hundred fifty-six".
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